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CogentRadios

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About CogentRadios

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  • Name
    Frank
  • Unit Number
    0
  • Location
    Fredericksburg Virginia

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  1. Thank you, I have reached out. I have a server and trying to install Allstarlink, running into a bit of a headace with that.
  2. Looking for some info myself. I have all the equip needed and getting the software lined out but having trouble figuring out where to get the node# from?
  3. Ok, lots of progress and trouble shooting years later. So first repeater, vx7000 worked great with Commspec 408 20+miles in south Texas flat land on 50' tower. The same setup worked not nearly as well in Fredericksburg Va. Maybe 2.5 miles, turns out if antenna is in tree level forget it. While researching this I discovered a research project by a federal agency essentially stating that bio matter such as trees for 400 mhz and up are power sponges and pine trees are the worst. I built several other repeaters since then using various radios such as Vertex 2100/2200, TY9000 or the Retevis models with a Id o matic repeater controller by hamgadgets. With perfectly tuned antennas, jumpers and various name brand and Chinese type duplexers a noticeable desense issue existed in these systems making the systems virtually unuseable further than a mile out. Fast forward to today. I invested in a real repeater, a BCR 40u from Bridgecom systems with the same antenna and duplexer as the previous radio repeaters the BCR repeater now covers spotty up to 12 miles and no more desense, with the antenna still at tree level. So now its just a matter of getting the antenna as high as possible. With the dual radio repeater setup everything was tried to fix the desense issue with no luck, as a last resort I thought about calling in a shaman. Once again while trying to fix the desense issue I found several articles relating to the sensitivity and selectivity of a repeater, these are NOT the same thing. Radios like the Vertex 2100/2200 have adjustments that can mitigate some of this but the Chinese radios do not and just dont have the selectivity to eliminate desense like an actual real repeater. Its been a long road, but now I can expertly tune duplexers and starting to grow hair back I pulled out during this process. I hope this helps someone and thank you to everyone that chimed in and tried to help. Coming soon, a node to link my repeater and I look forward to hopefully talking to some of you. 73 Frank
  4. Hi is there a place on myGMRS to sell equipment and such?
  5. Thanks for the insight, I am making up a new hardline and will check it on the analyzer.
  6. I cut the jumpers to tune, I heard anything over 30' does not matter, the hardline is 51'.
  7. Hahahaha, a bit scratchy. I ordered a comet replacement with an N connector until I can get a boom truck and make arrangements to get the db408 in place, another week and we will see.
  8. Yes everything has been tested and the antenna like I mentioned is a great dummy load. Everything is working the way it should. I think I was just surprised at how bad this antenna actually is. Like I mentioned previously I don't remember experiencing an antenna ever performing with all the correct numbers this poorly, except maybe a Firestick LOLOL. The Tram 1450 claims 5db gain and I am just wondering compared to what, a rock, I think an HT antenna would work better? LOLOL. Not sure if the beamwidth of the antenna works better at lower elevations but will let a friend try it out at his home once I get the replacement in. Either way thats what I get for not going commercial to start with. Thanks again for the responses and input. Frank
  9. Ok here is a followup, I have a 150 watt cellwave dup in the 7000. I have an identical setup going to a friend with the same results. So I am confident at this point it is the antenna. The Tram 1450 is obviously an awesome dummyload. Thanks for the suggestions and insight, in 30 years I have never had an antenna perform this poorly. I have a db408 on the way and excited to see the difference.
  10. Completed the 50' Rhon45 tower install yesterday, mounted a tram 1450 uhf antenna on the top and fed it with 1/2" EDC4-50 hardline. I used a Comet mkII caa analyzer at the end going into the vxr7000 and it shows 49 ohm and 1.1 swr output is 50watts. So everything seems near perfect, I am on a high point but I can only get into the repeater from about 1/4 mile away. The only thing I think can be an issue is the Tram 1450 antenna, it is just a wonderful dummyload. I ordered a DB408-b and a 22' chrome molly mast as a replacement. I was hoping to get at least 2 miles out of this current system. Anyone have any suggestions?
  11. CogentRadios

    GMRS Repeater

  12. CogentRadios

    GMRS Repeater

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